YUI is a free, open source JavaScript and CSS framework for building richly interactive web applications.
Why YUI?
Fast
YUI's lightweight core and modular architecture make it scalable, fast, and robust. Built by frontend engineers at Yahoo!, YUI powers the most popular websites in the world.
Complete
YUI's intuitive and well-documented API takes you from basic DOM handling to building performant and maintainable applications on desktop browsers, mobile devices, and servers.
Industrial Strength
A thriving community, a carefully architected infrastructure, and a comprehensive suite of tools help you code like a pro, from simple web pages to complex web applications.
Free & Open
YUI is free for all uses and is developed in the open on GitHub. Core team members can always be found in the forums and the #yui IRC channel on Freenode. Pull requests welcome!
A Few Examples
YUI Theater Videos
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YUI Open Hours: Buildy
In this YUI Open Hours session from February 23, 2012, YUI community member and contributor Eamon Brosnan (mosen in the #yui IRC channel) joins us from Down Under to tell us about Buildy, his fantastic new Node.js-based build tool, as well as ybuild, a companion tool for building YUI modules.
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Scott Schiller: Web Audio - HTML5 + Flash (in a tree)
At the February 6, 2012 BayJax event at Yahoo!, Flickr Frontend Engineer and SoundManager developer Scott Schiller uncovered HTML5 audio's dark and dirty secrets, and explained why he thinks both HTML5 audio and Flash audio have their place. Then he wowed the audience with a couple of spectacular live demos that you won't want to miss.
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Stephen Woods: Creating Responsive HTML5 Touch Interfaces
At the February 6, 2012 BayJax event at Yahoo!, Flickr Frontend Engineer Stephen Woods shared his hard-won advice for building responsive touch-based interfaces using HTML5, CSS, and JavaScript. He also revealed how Star Trek: The Next Generation predicted the need for instant user feedback in a touch-based UI and how Tivo's slow UI was made bearable by a simple "bloop" sound.
YUI Theater on YouTube
@yuilibrary on Twitter
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hshoff Clever javascript calendar rendering trick from the YUI folks: youtube.com/watch?v=dQfOuO…Retweeted by @yuilibrary -
We'll be doing some maintenance on yuilibrary.com between 7pm and 8pm PST, with some brief downtime. Hold onto your butts! -
@javaslack Ah, you may be right. Want to join us in IRC (#yui on Freenode) or the forums? Easier to talk there. ^RG
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@javaslack There are several types of DataSources. Can you be more specific? ^RG
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supporterwall We're looking for help rewriting and improving our wall builder using YUI. Also some ServerSide JS fun! Contact us if interested. :)Retweeted by @yuilibrary
Follow YUI on Twitter